#for循环
"""a = range(1-100,3)
for i in a:
    print("xujie")"""

#练习for循环1-100之间的偶数和

a = range(1,101)
b = 0
for i in a:
    if i%2==0:
        b +=i
print("0-100之间的偶数和为"+str(b))